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Finding the Fourth Proportional to 7,308.40, 10,955.40 and 3,611.20

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Solution

The fourth proportional to 7,308.40, 10,955.40 and 3,611.20 is: 5,413.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,308.40 : 10,955.40 = 3,611.20 : x
  2. Step 2: Convert to fraction form
    7,308.40/10,955.40 = 3,611.20/x
  3. Step 3: Cross multiply
    7,308.40x = 10,955.40 × 3,611.20
  4. Step 4: Simplify right side
    7,308.40x = 39,562,140.48
  5. Step 5: Solve for x
    x = 39,562,140.48/7,308.40
  6. Step 6: Final answer
    x = 5,413.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.